Engraving-mill.



G! A KER- ENGRAVING MILL.

APPLIUATION FILED 001 9, 190a 905,708.. Patented Dec. 1, 1908.,

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UNITED STATES PATENT oFFIeE. 1

, CHARLES ALISON KER, OF GLASGOW, SCOTLAND.

ENoRAvmo-MI LL.

T 0 all whom it may concern:

Be it known that 1, CHARLES Anson KER, a subject of the King of Great Britain, residing at Glasgow, Scotland, have invented certam new and useful Improvements in or Connected with Engraving-Mills, of which the following is a specification.

This invention relates to engraving mills or rolls and it has for its object, instead of engraving the mill as usual, to fit on the mill a thin metal plate or sheet with the engraving thereon.

Heretofore it has been usual to engrave the periphery of the solid mill itself and, with this system, after the mill has been used, it has to be stored or laid aside entire until again required so that a great many expensive mills have to be made, or when it is not necessary to keep the engraving for further use, the entire mlll is useless until it has been turned down so as to make it ready for reengraving, and, further, with this system, when it is desired to toss (i. e. to turn the engraving through an angle, in which it will be seen the angle of any ortion of the plate to the elemental lines ma ing up the surface of the roll will be changed) an entirely new mill has to be engraved with the tossed design. Under my invention I overcome these disadvantages by using one plain mill in lace of a series and fitting on the perip ery thereof a flat, preferab y steel, plate or sheet having the design engraved on the surface thereof, and when this plate has been used it can be readily removed and another fitted in its place, and after the plates have been used, they can be stored without inconvenience. Further, the plates can readily be turned on the mill through any desired angle, being adapted to receive a number of tosses.

In order that this invention may be clearly understood I have hereunto appended exlanatory drawings, which show, by way of lllustration or example, the preferred method of carrying out the invention.

Figure 1 is a side elevation of one side of the mill. Fig. 2 is a'side elevation of the opposite side of the same. Fig. 3 is a cross section of the same on the line a::c. Fi 4 is a plan view of the sheet or plate d. 5 is an enlarged view of the winding drum h.

In the arrangement shown, a plain mill a havin a spindle b is used and secured to thisn mill, y means of a set screw or pin or the like c, is a circular sheet or plate 6 of steel or plate, means upon Specification of Letters Patent.

Application filed. October 9,

Patented Dec. 1, 190s.

1908. Serial No. 456,871.

the design or y any of the The set pin 0 is other suitable metal, havingJ pattern engraved thereon usual engraving processes.

passed through one of a'series of holes e, an

that through which the set pin 0 is passed, a

hook f is engaged, the said holes providing engaging means for the hook and pin. Secured to this hook is a wire or its equivalent 9 which is passed round the mill and 1s wound upon a small druin it fitted in a recess 2' in the mill and carried on a spindle j passed longitudinally through the mill and held securel in place by means of set screws or pins The drum h is provided at one end thereof with a series of tommy holes land at the opposite end with a ratchet wheel m with w ich enga es a awl n pivoted to a rib n on the side we 1 of t e recess 2', the drum It being capable of rotation by means of an instrument inserted in the tommy holes and being also prevented from releasing by means of the pawl and ratchet. With this arrangement t e engraving is made upon the surface of the plate d, which is thereafter secured, by mean of, the set screw or pin 0, to

the mill, the hook) being then engaged and the drum it turned so as to tighten up the wire 9 and draw the plate circumferentiall firmly and tightly round the mill. When it IS necessary to toss the plate the pawln is disengaged so as to enable the wire 9 to be slackened and the set pin 0 then withdrawn f and passed through one of the other holes e in the late and again into the same hole in the mill, hole 8 which is now diametricall op osite the set screw or pin whereupon t e p ate is drawn tightl round the mill as before. The plates may e of other form instead of circular.

If so desired, in the case of large plates, a series of tightening devices may be employed. In this manner removable patterns are applied to mills whereby the expense of fresh mills for each pattern is avoided, and the process of engraving, and the time occupied thereby, are ve much economized.

Havin now ull described my invention what I c aim and esire to secure by Letters Patent is 1. The combinati pf a roll, an engraved for fastening said the hookf being engaged with that plain to said mll edit-l atltlltiunztl moans film than the mil fur tightly winging the plate n ur the surface at the roll.

Th1 cumhinatlun of a roll, an LFliglzbVttl a tin l'm' securing said plate to said rat-ans 11pm: the roli fur drawing the 4 0W1 tlw surface of he roll mmllinatiun of a roll, :11 vngt'm'ml 3 pim nit-um for ft:'-;E(i-HlI!.g one edge: of said pm? Eu thv Full, n (litflllltlfii'tilllzll ti tuning; titw'ilre in tin roll and means unnnecting Th0 said tiglttmting device w ltl1 tlw apposite ()(lgv 1 .1! mid phitfi l 4. Kn engraving ml], at trircnmfm'vntinll l njttppvd itn u'pssinn (lit thtsvvfm, and Int-am for securing thv ends of tho Jut 0 thv roll and liglltl'flllifl llli same- :tt any at it plurality of ang v \Yltlt rt-l'm'vntttn thv Plmnentul Inna; n1 tlw Hull (if said toll lat Illtliil plate, means for fastening said plate at one part 01' its circurnfermme t0 the lUll, a tightening drum in the roll, pawl and ratchet mechanism connected with said tightening drum and n flexible connection fast mad at the one rend to said drum and at tinnthm" 0nd (letuvlmbly fastened to said plattv.

T. The combination with at mll havin; a I'OCISH tilt-rein, ul' :1 drum IOtitlflljtlf, locate in said recess, ratchet and pawl mechanism t-mmctztt-tl with said drum, 2L circular n1etallic. disk having a number of holes around its circumference, at set pin Capable of being mssml through one of said lmlvs into a hole 1n tlne roll and 111mm connecting said disk tn suit! (llLliN e-n'mnnl'm' ntiztlly in iflll manner that by tlw winding: of tltv Llvl'lilll the dial; can in: tightly wrapped on thv roll.

ln tvi-htinmny lam-emf 1 Mil); my Sign-HUI?! in illt'hlfit'? of twu witnrssws.

(HARLES ALISON .lillltt \Tlnvssvs:

tinnnun WULFE BRUCE; Hunnm. A. THOMSON. 

